Boat construction



Dec. 22, 1931.

G. W. HEINEMANN ET AL BOAT CONSTRUCTION Filed April 6, 1951 2 Sheets-Sheet l Inventors M flake mam 7 M d m M M Dec. 22, 1931. (5. w. HEINEMANN ETAL 1,837,711

BOAT CONSTRUCTION Filed A ril 6, 1931 2 Sheets-Sheet 2 Inventor J Q MK //e/'ms mam 7 (/Z flame/77cm Patented Dec. 22, 1931 UNITEDSTATES GERNOT w. HEINEMAN'N AND ARTHUR HEINEMANN, on BELLING m WAsHIN GToN; r r ARTHUR HEINEMANN ADMINISTRATOR on ESTATE or .SAID GERNOT w. nnmn- MANN, DECEASED BOAT consTnuoTTo v Application filed April 6, 1931. Serial No 528,174. assembly. A of the 'boat is built of'steel or N This invention relates to a boat construction,the general object of the invention being to form a light-weight boat of strong structure by forming the frame of the boat of aircraft tubing or channel steel, all parts of which are welded together with the planking T fastened to the frame with self tapping sheet metal screws and the framing beingconnected at the sides to metal members which act to stifien the boat longitudinally and also act to support a coaming in a'water proof manner.

Another object of the invention is to pro" vide a waterproof flooring in the lower part of the boat which forms with the bottom part of the boat an air chamber which may be divided "into compartments by waterproof bulk heads so as to prevent the boat from sinking when damaged below the water line.

This invention also consists in certain other features of construction andin the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended Figure 1 is a perspective view of, the frame of the boat constructed in accordance with this invention. a

Fig. 2 is a transverse sectional view.

through a round bottom boat.

Fig. 3 is a section on the line 3-1-8 of Fig. 2. Fig. 4 is a detail view of a portion of one side of the boat showing'howa longitudinally extending member is connected with one of.

the side membersof the frame.

Fig. 5 is a sectional view through the'stem of the boat. r

Fig. 6 is-a side View of the stem member. Fig. 7 isa view similar to Fig; 2, butshow- D formed ofchannel steel. r

Fig. 8 is a section on the line 8-8 of-Fig. 7 Asis shown in these drawings, the frame in a'fiat bottom boat with the framing 'ric treated with aircraft other tubing 1, as shown in Figs. 1, 2, and 5 or of channel steel?) assho-wninFigs.

7 and 8. The parts are allwelded together .7

or brazed or connected by gussetplates and boltswhere necessary; I f

As shown in Fig.1, the frame'Ais 'composed of a plurality of transverse members which passes through recesses 5 formed in the central portion ofthe bottom partof the members and the'upper ends of each of the members 13 is bent inwardly asshown'at 6 B which are connected togetherby a keel 4 and connected'tothe longitudinal members 7 n which act'as longitudinalstiifening and bracing members, and'also as supports for coaming. These members 7 are connected to the side portions of the member B by the diagonal bracesS. These members 7 may extend from the stern frame to the first frame or member B having cross beams for'the decking incorporated in its structure, orthey may'extend {)hroughout the length of the boat in undecked oats.

As shown in Fig. 2, the framing maybe shaped to provide around bottom boat or it theflooring 10, and thecross members 9am bracedbythe bracesll. i V The flooring 10, the planking 12 and the coaming (not shown) arepall fastened to the frame by the self tapping sheet metalscrews are covered on both sides with airplane fabfabricwaterproof. V p

As shown-in Figs; 2and- 7 the flooring Y 13, and the flooring, planking and coamlng dope to make the forms a watertight chamber 15v in the bottom 7 of the boat which may be'divided into compartments by waterproof bulkheadsso'as'to prevent the boat from sinking if it should be p I damaged below the water line.

connected with the front end of the ken-4" The stem member 16 at its lower end-is and said memberis formed of tubing 17 or the like, and the wing forming plates '18 welded thereto against which the front ends of the planking rest. The screws 13 which. passthrough the front ends of the planking also pass through the plates 18 and the tube 17. Thenose member 19 is of substantially triangular shape, and abuts the front end of the planking and is fastened to the tube 17 by meshed-metal screws 20. a r v p 1 From the foregoing it will be seen thatwe have provided a light-weight boat, the framing of which is formed of any suitable metal of tubular, channel or other suitable cross sectional shape, and the parts"ofwhich"are .all iwelded, brazed'or otherwise connected together, the boat being provided with airtight compartments in its lower, part to prevent the boatfrom sinking and all thewoodenv parts are covered with aeroplane fabric or the like treated with aeroplane dope to prevent dry I rot and to make the parts waterproof.

v The boat can be constructed at low cost 7 and has great strength andv is of, light-weight equipment.

and, is thoroughly seaworth. Each channel member is built up from three strips'of sheet steel,.the center one straight and bent as need- 7 ed, andjthe outer ones out, curved as needed and welded together so as to form a boat rib ofthe proper shape without necessity for further "bending after the strips are .welded together.

A boat rib of this construction would be as strong asadi-est amped one and uch easier to make (with less expensive ,It is thought from the foregoing description that the advantagesandnovel features of the invention'w ill be readily apparent.

-It is to be understood that changes may be made in the construction andinthe, comibination and arrangement of the several -lparts, provided that such changes fall within ,the scope of t'heappended claims;

we claim as new is l 1 Having thusdesoribed our invention, what 1 A boat f the class describ ad comprisinga frame formed ofmetalparts-of hO'llOW cross sectional, shape, thejoints of; which are integrally connected. together'and said frame including a longitudinally extending ,mem-

' ber ateach side thereof connected with the .upper' end .of the upright portion of the framing, and planking connected jto the "f ame by self-tapping sheet anetalscrewsQ ing-afframe formed of metal-parts of hollow '2. A boat of the class described compriscross-sectional shape, the jointsof which are --;welded or brazedand said frame including a longitudinally extending -member at; each side welded or brazedrto the upper, ends of "the Verticalportions of the frame andbr'aces connecting the longitudinal members of the side members and; welded "or: brazedi to :the

members and a longitudinally; extending mem- Vidin wings, planking forming the; sides of the ing-formin the sides ofthe boat,=a coaming supported y the longitudinal menibers,"-said flooring, planking and 'coamirig having both sides covered with aeroplane fabric treated with aeroplane dope andvthe flooring prog 'a watertight compartment for pre- .ventingsi-nking of; the boat.

g '4. A boat of the class described comprising a frame part formed qf-metahand including a plurality of spaced transversely arranged members, the-upper ends of- -each of which is bentinwardly, alongitudinally extending member welded orbrazed toe the ends I ofthe inwardly-extending; part, .brgaee anem- 1 bers for the longitudinally iextendingmembers welded orblazed to thesaid, members and to the side portions of the;t1;ansverse 'memc bers, a stem member formed of metalof hol low cross sectional; shape, metal platesawelded or brazed to 1 said hollow; member and forming wings, planking forming the sides off-the boat and self tapping sheetmetal screws-con nectmg the plank ng-to the; metahparts with screws atrthefront end of the planking passing; thru the plates {andthe hollow members.

5.;A A boat of the vclass described comprising a frame part formedof- 'metal and including a: plurality of spacedetransversely arranged members, the upper ends of eachof hi h ti bent inwardly a longitudinally extending member welded or brazed "to (the ends ofthe inwardly; extending part, brace members" for the longitudinally extend-ing me mbers welded or brazed'to the sa -id membersand-to the side portions of the transverse I members-5a stem memberformed'ofmetal of hollow cross sectional shape, metal plates welded or brazed t0 2 said hollow -member :and, forming boat and self tapping sheet-metalwscrews connecting: the planking to the imetal -parts with screws at the front end-of-the planking passing through the platesand theyho'llow members, a keel member passing through-the v recesses formed ;in -the transverse members and having the-frontends conn'ecting with I the stem -member, cross members forming part of the frame,- flooring supportedonathe cross members. and forming-an airtightcompartment in the bottom of the boat,.coaming supported by the -longi-t 11dinal:members, hero- .plane fabric; covering" both faces-of the flooring, the planking and-thecoamingmnd said "fabric being treated-with' aeroplane f-dope :to render the sameiwater-preof J 6. 1A-, boat of- -the, classdcseribed: (:Qmprising f 

